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3 stage audio amplifier

3 stage audio amplifier

General Radio Company
AT&T receiver

AT&T receiver

Western Electric Company
circa 1900
AT&T receiver

AT&T receiver

Western Electric Company
1895-1899
Audio instrument, oscillator. Large rectangular body, wood frame on sides, black front panel and decorative grill on to pand back. On front panel, large dials, circular window for meter, pair of electrical connectors, indicator light and switches.

Audio instrument, oscillator. Large rectangular body, wood frame on sides, black front panel and decorative grill on to pand back. On front panel, large dials, circular window for meter, pair of electrical connectors, indicator light and switches.

General Radio Company
1939
audio oscillator, 600-Hz

audio oscillator, 600-Hz

General Radio Company
1925-1930
beat frequency audio oscillator

beat frequency audio oscillator

General Radio Company
circa 1930
beat-frequency oscillator

beat-frequency oscillator

General Radio Company
circa 1935
beat frequency oscillator

beat frequency oscillator

General Radio Company
circa 1925
Bell #10 deskset ringer box

Bell #10 deskset ringer box

Western Electric Company
circa 1897
Bell #10 deskset ringer box

Bell #10 deskset ringer box

Western Electric Company
1897-1898
Bell transmitter

Bell transmitter

Western Electric Company
1898
BIRD CRAPPED BASE!

BIRD CRAPPED BASE!

Western Electric Company
1924
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